Governmental Abbreviations
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| Term | Meaning / Abbreviation |
|---|---|
| O/ET |
O/ET Stands For : Orbiter/External Tank. |
| O/F |
O/F Stands For : Oxidizet-to-Fuel Ratio. |
| O/L |
O/L Stands For : Overload. |
| O/L-RC |
O/L-RC Stands For : Overload-Reverse Current. |
| O/O |
O/O Stands For : On Orbit. |
| O/R |
O/R Stands For : Outside Radius | Oxygen Relief. |
| O/V |
O/V Stands For : Overvoltage. |
| O/V-U/V |
O/V-U/V Stands For : Over Voltage/Under Voltage. |
| OAA |
OAA Stands For : Orbiter Access Arm | Orbiter Alternate Airfield. |
| OAET |
OAET Stands For : Office of Aeronautics. |
| OAFD |
OAFD Stands For : Orbiter Air Flight Deck. |
| OAFTO |
OAFTO Stands For : Orbiter Atmospheric Flight Test Office. |
| OAL |
OAL Stands For : OverAll Level | Office of Administrative Law | Over All Length. |
| OALC |
OALC Stands For : Ogden Air Logistics Center. |
| OAMS |
OAMS Stands For : Orbital Attitude and Maneuvering System. |
| OANS |
OANS Stands For : Orbiter Ancillary. |
| OAO |
OAO Stands For : Orbiting Astronomical Observatory | Original Art Only. |
| OAO-3 |
OAO-3 Stands For : Orbiting Astronomical Observatory 3. |
| OART |
OART Stands For : Office of Advanced Research and Technology. |
| OASCB |
OASCB Stands For : Orbiter Avionics Software Control Board. |
| OASPL |
OASPL Stands For : Overall Sound Pressure Level. |
| OAST |
OAST Stands For : Office of Aeronautics and Space Technology (now OAET). |
| OBCO |
OBCO Stands For : Onboard Checkout (Instrumentation). |
| OBCS |
OBCS Stands For : Onboard Checkout Subsystem. |
| OBDH |
OBDH Stands For : On Board Data Handling. |
| OBDU |
OBDU Stands For : On-Board Diagnostic Unit. |
| OBSS |
OBSS Stands For : Orbiter Boom Sensor System. |
| OBV |
OBV Stands For : Oxidizer Bleed Valve | On Balance Volume. |
| OCALC |
OCALC Stands For : Oklahoma City Air Logistics Center. |
| OCDR |
OCDR Stands For : Orbiter Critical Design Review. |
| OCDU |
OCDU Stands For : Optics Coupling Data Unit (G&N). |
| OCGF |
OCGF Stands For : Organic Crystal Growth Laboratory Facility. |
| OCH |
OCH Stands For : Orbiter Common Hardware. |
| OCN |
OCN Stands For : Order Control Number. |
| OCRM |
OCRM Stands For : Orbiter Crash and Rescue Manuals. |
| OCT |
OCT Stands For : Octal. |
| ODAS |
ODAS Stands For : Onboard Data Acquisition System. |
| ODCDR |
ODCDR Stands For : Orbiter Delta CDR. |
| ODDS |
ODDS Stands For : Operational Data Delivery Services. |
| ODF |
ODF Stands For : Orbit Determination Facility | Oregon Department of Forestry. |
| ODRAN |
ODRAN Stands For : Operational Drawing Revision Advance Notice. |
| OEAS |
OEAS Stands For : Orbital Emergency Arresting System. |
| OECO |
OECO Stands For : Outboard Engine Cutoff. |
| OES |
OES Stands For : Orbiter Emergency Site | Other Error Sources | Occupational Employment Statistics. |
| OESS |
OESS Stands For : Orbiter/ET Separation Subsystem. |
| OFA |
OFA Stands For : Office of Flight Assurance | Object Free Area | Office of Family Assistance | Office of Finance and Administration. |
| OFCC |
OFCC Stands For : Office of Federal Contract Compliance. |
| OFDS |
OFDS Stands For : Orbiter Flight Dynamics Simulator | Oxygen Fluid Distribution System. |
| OFI |
OFI Stands For : Operational Flight Instrumentation | Opportunity for Improvement | Office of Financial Institutions. |
| OFK |
OFK Stands For : Official Flight Kit | Optical Flight Kit. |